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c#sdlsdl-2
jsmars
jsmars

Reputation: 1918

Detecting window events in the SDL2 C# wrapper

I'm using the SDL2 C# wrapper through FNA and I need to be able to detect when the window resizes, min/maximizes, etc. From what I've found it seems I should use the SDL_EventFilter delegate and SDL_WindowEventID enum. I've tried attaching such an event using SDL_AddEventWatch and SDL_SetEventFilter methods, but I'm not getting any events related to window management.

How do I use the SDL window events in the C# wrapper correctly?

Upvotes: 3

Views: 1022

Answers (1)

Maximilian Riegler
Maximilian Riegler

Reputation: 23506

In your event polling loop add a case for SDL_WINDOWEVENT:

SDL_Event event;
while (SDL_PollEvent(out sdlEvent) == 1) {
     switch(sdlEvent.type) {
         case SDL_EventType.SDL_WINDOWEVENT:
             HandleWindowEvent(sdlEvent.window);
             break;

         // other events here ...
     }

     Thread.Sleep(1);
}

And then you could have a method handling those events:

HandleWindowEvents(SDL_WindowEvent wEvent) {
    switch(wEvent.windowEvent) {
        case SDL_WindowEventID.SDL_WINDOWEVENT_RESIZED:
            Console.WriteLine($"Window resized: {wEvent.data1}x{wEvent.data2}");
            break;

        // more window events here ...
    }
}

All window events are outlined in the Wiki.

Upvotes: 2

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